| 峡口高地应力软岩隧道施工监测及支护对策研究 |
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| 引用本文： | 李鸿博,戴永浩,宋继宏,付克俭.峡口高地应力软岩隧道施工监测及支护对策研究[J].岩土力学,2011,32(Z2):496-501. |
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| 作者姓名： | 李鸿博 戴永浩 宋继宏 付克俭 |
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| 作者单位： | 华中科技大学土木工程与力学学院;中交第二公路勘察设计院有限公司;中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室;湖北宜巴高速公路建设指挥部; |
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| 基金项目： | 国家重点基础研究发展规划(973)(No.2009CB724603); 国家自然科学基金(No.40772184); 中国科学院武汉岩土力学研究所知识创新工程领域前沿项目(No.0714011Q01) |
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| 摘 要： | 针对高应力软岩公路隧道的特点,对湖北宜巴高速公路峡口隧道开展了地应力测试、隧洞收敛下沉、接触应力、结构受力等项目的监测工作。地应力测试结果表明,虽然隧洞埋深不大,但由于构造应力的存在,仍属于高地应力区。施工监测结果表明,高应力软岩隧道变形与结构受力具有明显的时空效应,与开挖方式、工作面距离以及支护时机密切相关。由于隧洞围岩软弱破碎,加之处于高应力作用下,在工作面通过后,岩体产生持续性的流变变形,导致隧洞产生挤压大变形和结构受力的持续增加,达到支护结构强度极限,最终导致围岩失稳和支护体系的失效。基于上述研究成果,提出了相应的高应力软岩大变形支护设计对策。研究成果为高应力软岩隧道变形与结构受力的时空效应性提供了监测数据支持,为峡口隧道的施工和支护设计提供了依据,对我国西部其他高应力软岩公路隧道的建设具有借鉴意义。
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| 关 键 词： | 高地应力 流变 软岩 监测 支护措施 |
| 收稿时间： | 2011-06-13 |
Construction monitoring for Xiakou soft rock tunnel under high geostress and its supporting measures |
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| LI Hong-bo,DAI Yong-hao,Song Ji-hong,FU Ke-jian.Construction monitoring for Xiakou soft rock tunnel under high geostress and its supporting measures[J].Rock and Soil Mechanics,2011,32(Z2):496-501. |
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| Authors: | LI Hong-bo DAI Yong-hao Song Ji-hong FU Ke-jian |
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| Institution: | 1. College of Civil Engineering & Mechanics, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Second Highway Consultants Co., Ltd., China Communications Construction Corporation, Wuhan 430056, China; 3. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 4. Headquarters of Yichang-Badong Highway Construction of Hubei Province, Xingshan, Hubei 443700, China |
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| Abstract: | According to the characters of high geostress soft rock,in-situ stress test,crown settlement and convergence,contact stress,and structural stress monitoring are performed for Xiakou tunnel of Yichang-Badong highway in Hubei province.The in-situ stress test results show that the geostress is very high even if the embedded depth is not too large.The monitoring results also show that the deformation and structure stress of the high geostress soft rock tunnel,is closed related with the excavation way,distance t... |
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| Keywords: | high geostress rheology soft rock monitoring supporting measures |
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